#403FA9#403FA9

#403FA9 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.165 H 277.5°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#403FA9
RGB	rgb(64, 63, 169)
HSL	hsl(241, 46%, 45%)
HSV	hsv(241, 63%, 66%)
CMYK	cmyk(62.1%, 62.7%, 0%, 33.7%)
CIE-LAB	lab(32.94, 33.10, -56.92)
CIE-LCH	lch(32.94, 65.85, 300.18°)
OKLab	oklab(43.54% 0.0215 -0.1638)
OKLCH	oklch(43.54% 0.165 277.5)
XYZ	xyz(11.0510, 7.5087, 38.3954)
Luminance	0.0751 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403FA9 #A8A93F

analogous

#3F73A9 #403FA9 #753FA9

triadic

#403FA9 #A9403F #3FA940

tetradic

#403FA9 #A93F73 #A8A93F #3FA975

square

#403FA9 #A93F73 #A8A93F #3FA975

split-complementary

#403FA9 #A9753F #73A93F

monochromatic

#1E1E50 #2F2E7C #403FA9 #6261C4 #8E8ED5

Accessibility & contrast

On white

8.39

#403FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#403FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403FA9

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403FA9	#FFFFFF	#000000	##FFFFFF
##403FA9	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AC

Deuteranopia (green-blind)

#0049A7

Tritanopia (blue-blind)

#00596E

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #403fa9;
/* rgb */ color: rgb(64, 63, 169);
/* oklch */ color: oklch(43.5% 0.165 277.5);

Tailwind

colors: {
  custom: {
    50: '#8074c3',
    500: '#403fa9',
    950: '#000000',
  },
}

SCSS

$custom: #403fa9;
$custom-light: #8074c3;
$custom-dark: #000000;

JSON

{
  "hex": "#403fa9",
  "rgb": {
    "r": 64,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 240.566,
    "s": 45.69,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43543,
    "c": 0.16524,
    "h": 277.5
  },
  "luminance": 0.0751
}

Semantic roles & 50–950 ramp

primary

#403FA9

secondary

#BFC084

accent

#D552D4

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #403FA9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →